Samsung‘s 81F Series LCD TVs come in four sizes: 40″, 46″, 52″, and 57″. All are driven by a LED backlight. The advantages of a LED backlight are many and one of the features Samsung calls LED Motion Plus is important. The LED Motion Plus cycles eight rows of LEDs progressively and sequentially turns each row on and off every eight of a second. This greatly improves motion blur.

Another advantage of a LED backlight over the typical CCFL backlight is the improved ability to incorporate local dimming. The 81F Series LCD TVs have an auto-controlling local dimming capability that dims dark parts of the picture resulting in bright areas standing out. There are many levels of dimming so the details in even dark areas improve. This is the reason why you see in the specifications an incredible 500,000:1 dynamic contrast ratio.